 Back fire, loss of power, smoking, Back fire, loss of power, smoking |
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| tsvo |
 Jul 12 2020, 11:28 AM
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Member  Group: Members Posts: 123 Joined: 30-January 16 From: Chicago Member No.: 19,616 Region Association: Upper MidWest 
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Hello, I am looking for advice. I have a 1973, 1.7 with FI. It stalled on me, was idling low. Then started to backfire, constantly. Little to no acceleration with pedal pushed. Was only able to hit 25mph. If not on gas, stalled immediately. Started smoking heavily. Seemed to be more from the exhaust. No leaks or drips. Motor was fairly cold, but exhaust was very hot.
Have changed the fuel pump, relocated filter up front. Recently adjusted the points and injectors. Any help is much appreciated. Regards, Terry |
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| BillC |
Jul 12 2020, 02:58 PM
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Senior Member Group: Members Posts: 536 Joined: 24-April 15 From: Silver Spring, MD Member No.: 18,667 Region Association: MidAtlantic Region
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There is no EGR valve in the stock FI in a '73 1.7.
Was the car running okay before this happened? My first guess would be to check the fuel pressure. Could be a bad fuel pump or a clogged fuel sock (inside the tank). Going very lean from low fuel pressure will cause your engine to run poorly. But, driving it while very lean can damage the engine, which could be the source of your smoke. |
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| tsvo |
Jul 12 2020, 03:19 PM
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Member Group: Members Posts: 123 Joined: 30-January 16 From: Chicago Member No.: 19,616 Region Association: Upper MidWest
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QUOTE(BillC @ Jul 12 2020, 03:58 PM)  There is no EGR valve in the stock FI in a '73 1.7. Was the car running okay before this happened? My first guess would be to check the fuel pressure. Could be a bad fuel pump or a clogged fuel sock (inside the tank). Going very lean from low fuel pressure will cause your engine to run poorly. But, driving it while very lean can damage the engine, which could be the source of your smoke. Bill, Thanks for your input. Clearly I didn't realize there was now EGR. Thanks, I was just trying to figure it out from symptoms. I didn't drive it far, a few blocks home. Hopefully not too much damage. Regards, Terry |
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